1 files changed, 81 insertions, 0 deletions
diff --git a/inc/shared.h b/inc/shared.h
new file mode 100644
index 0000000..14c4f19
--- /dev/null
+++ b/inc/shared.h
@@ -0,0 +1,81 @@
+/**
+ * Copyright (c) 2019, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *    * Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above
+ *      copyright notice, this list of conditions and the following
+ *      disclaimer in the documentation and/or other materials provided
+ *      with the distribution.
+ *    * Neither the name of The Linux Foundation nor the names of its
+ *      contributors may be used to endorse or promote products derived
+ *      from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SHARED_H
+#define SHARED_H
+
+#if defined(__NIX)
+// TODO these sections not supported?
+//static __so_func *__autostart[] __attribute__((section (".CRT$XIU"))) = { (__so_func*)__so_ctor };
+//static __so_func *__autoexit[] __attribute__((section (".CRT$XPU"))) = { (__so_func*)__so_dtor };
+
+#define SHARED_OBJECT_API_ENTRY(ctor, dtor)
+
+#elif defined(_WIN32)
+#include <windows.h>
+
+typedef int __so_cb(void);
+static __so_cb *__so_get_ctor();
+static __so_cb *__so_get_dtor();
+
+typedef void __so_func(void);
+static void __so_ctor() {
+   (void)(__so_get_ctor())();
+}
+
+static void __so_dtor() {
+   (void)(__so_get_dtor())();
+}
+
+#pragma data_seg(".CRT$XIU")
+   static __so_func *__autostart[] = { (__so_func*)__so_ctor };
+#pragma data_seg(".CRT$XPU")
+   static __so_func *__autoexit[] = { (__so_func*)__so_dtor };
+#pragma data_seg()
+
+#define SHARED_OBJECT_API_ENTRY(ctor, dtor)\
+   static __so_cb *__so_get_ctor() { return (__so_cb*)ctor; }\
+   static __so_cb *__so_get_dtor() { return (__so_cb*)dtor; }
+
+#else //better be gcc
+
+#define SHARED_OBJECT_API_ENTRY(ctor, dtor)\
+__attribute__((constructor)) \
+static void __ctor__##ctor(void) {\
+   (void)ctor();\
+}\
+\
+__attribute__((destructor))\
+static void  __dtor__##dtor(void) {\
+   (void)dtor();\
+}
+
+#endif //ifdef _WIN32
+
+#endif // SHARED_H